Table 2.
Lactating women characteristics (n = 143).
| Characteristic | |
|---|---|
| Age (years) | 35.61 (0.39) (4.67) * |
| Weight (kg) | 61.20 (55.20, 70.60) |
| Height (cm) | 163.85 (0.53) (6.39) * |
| Pre-pregnancy BMI (kg/m2) | 22.16 (20.55, 24.92) |
| Pre-pregnancy BMI (kg/m2) category | |
| Underweight (<18.5) | 6 (4.2%) |
| Normal (18.5–24.9) | 103 (72.0%) |
| Overweight (25–29.9) | 20 (14.0%) |
| Obese (≥30) | 14 (9.8%) |
| Current BMI (kg/m2) | 22.94 (21.12, 25.29) |
| Current BMI (kg/m2) category | |
| Underweight (<18.5) | 5 (3.5%) |
| Normal (18.5–24.9) | 101 (70.6%) |
| Overweight (25–29.9) | 19 (13.3%) |
| Obese (≥30) | 18 (12.6%) |
| Gestational weight gain (kg) | 11.00 (8.00, 13.60) |
| Postpartum weight retention (kg) | 1.00 (−0.60, 3.00) |
| Number of living children | |
| 0 a–1 | 81 (56.6%) |
| 2 | 49 (34.3%) |
| ≥3 | 13 (9.1%) |
| Country of origin: Spain | 125 (87.4%) |
| Education level | |
| Secondary studies | 6 (4.2%) |
| Technical studies | 17 (11.9%) |
| University studies | 120 (83.9%) |
| Currently working (Yes) | 65 (45.5%) |
| Physical activity | |
| Sedentary | 35 (24.5%) |
| Low activity | 72 (50.3%) |
| Active/very active | 36 (25.2%) |
| Tobacco consumption | |
| Prior to pregnancy (Yes) | 28 (19.6%) |
| During pregnancy (Yes) | 3 (2.1%) |
| Currently (Yes) | 2 (1.4%) |
| Alcohol consumption | |
| Prior to pregnancy (Yes) | 72 (50.3%) |
| During pregnancy (Yes) | 2 (1.4%) |
| Currently (Yes) | 7 (4.9%) |
| Season during the study | |
| Spring | 30 (21.0%) |
| Summer | 23 (16.1%) |
| Autumn | 52 (36.4%) |
| Winter | 38 (26.6%) |
Quantitative variables following a normal distribution are described using the mean (standard error) (standard deviation), whereas the median (25th percentile, 75th percentile) is used for variables following a non-normal distribution. Qualitative variables are described by absolute and relative frequencies (%) of their categories. * Normal distribution. a One fetal death at 22+6 weeks of gestational age. Abbreviations: BMI, body mass index.